I posted this earlier in another reply, but it seems appropriate here as well. my chassis started out as a Locost and evolved towards a Roadster as time went on and due to donor part availability. So when it came to welding on the front brackets I was quite nervous. I bought a caster/camber gauge so that I could confirm the correct positioning of the brackets before I welded them completely. This required welding on the lower brackets, having the front arms and hubs assembled to the upper and lower brackets, then using a jig to hold the upper brackets in position. By moving the upper brackets fore and aft, I could fine tune the caster and then weld them in position.
I feel good about the money I spent on it, cause I will use it many times in the future on my car and on other cars as well. It is also one of those tools that you can loan to friends and they owe you a favor.
http://cgi.ebay.com/ebaymotors/ws/eB...m=130487230814
http://cgi.ebay.com/ebaymotors/Longa...Q5fCarQ5fParts